i know there was topics:
http://hub.jmonkeyengine.org/groups/contribution-depot-jme3/forum/topic/shader-based-grass-or-fur/
http://hub.jmonkeyengine.org/groups/graphics/forum/topic/billboard-grid-pixelshader-for-instant-animated-grass/
but is there implemented any JME solution for create grass by pixelshader? Do you have plans to create it? Or just leave it for users?